> Ok I have a vague idea on how this could but its likely that the > changes make things worse rather than better. Additional reference to a > new cacheline (per cpu but still), preempt disable. Lots of code at all > call sites. Interrupt enable/disable is quite efficient in recent > processors. The goal of this was not to be faster than interrupt disable, but to avoid the interrupt latency impact. This might be a problem when spending a lot of time inside the locks. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- References:
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Andi Kleen <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Andi Kleen <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Andi Kleen <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Andi Kleen <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Andi Kleen <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- From: Christoph Lameter <[email protected]>
- Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- Prev by Date: Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- Next by Date: Re: [2.6 patch] w1_remove_master_device(): fix check-after-use
- Previous by thread: Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- Next by thread: Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c
- Index(es):